Source: ESO Science Release eso1124
COSMOS field imaged by the Canada France Hawaii Telescope (CFHT).
Image credits: CFHT/IAP/Terapix/CNRS/ESO.
A new study combining data from ESO’s Very Large Telescope and ESA’s XMM-Newton X-ray space observatory has turned up a surprise. Most of the huge black holes in the centres of galaxies in the past 11 billion years were not turned on by mergers between galaxies, as had been previously thought. (read more)